文献类型：期刊文献

中文题名：超临界发泡制备泡沫炭及其泡孔形成机理

英文题名：Preparation and Foaming Mechanism of Carbon Foams by Supercritical Foaming Method

作者：李娟[1];张翠翠[1];王灿[1];詹亮[1];乔文明[1];梁晓怿[1];凌立成[1]

机构：[1]华东理工大学,化学工程联合国家重点实验室,上海200237

年份：2010

卷号：28

期号：4

起止页码：544

中文期刊名：材料科学与工程学报

外文期刊名：Journal of Materials Science and Engineering

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(50672025,5073003,20806024);中国博士点基金资助项目(20070251008);国家863重点资助项目(2008AA062300)

语种：中文

中文关键词：泡沫炭;超临界;发泡

外文关键词：carbon foam; supercritical; foaming

摘要：分别以中间相沥青和甲苯作碳质前驱体和发泡剂,采用超临界发泡技术制备出孔径为10~25μm的泡沫炭,并着重研究了超临界发泡条件对泡沫炭的孔形及韧带结构的影响。超临界发泡包括成核、扩散、聚集及膨胀过程,同时泡孔的形成也是热力学、动力学及力学行为综合作用的结果。由于中间相沥青中存在轻组分,超临界发泡过程伴随着自发泡过程,由此可获得层次孔结构的泡沫炭。
Carbon foams with pore sizes of 10~25μm were prepared by supercritical foaming method.Mesophase pitch and toluene were introduced as the carbonaceous precursor and supercritical agent,respectively.The effects of supercritical foaming conditions on the pore shape and ligament structure were investigated.The supercritical foaming process,including nucleation,diffusion,aggregation and expanding process,was the result of the exchange of mass and energy as well as the kinetic and mechanical behaviors between supercritical toluene and pitch matrix.Hierarchical porous carbon foams arose from the supercritical foaming process combined with self-bubble process are attributed to the light components of mesophase pitch.